Isekai Quartet

Diablo, Rimuru, Benimaru

Skin: Usually dark red or crimson, the classic oni color, emphasizing its nature and fighting spirit.
Horns: Large, curved horns growing from the head are an important attribute of the oni; they are not only decorative but also symbolize its status and power.
Face: Sharp, expressive features, often with a stern or focused expression. The gaze is piercing and attentive, as if constantly assessing the threat.
Eyes: Often depicted as bright red or amber, which enhances the demonic image.
Hair: Black, thick, sometimes tousled, emphasizing his wild, indomitable nature.
Clothing and armor: In combat, he wears light armor that leaves his arms and shoulders exposed to allow for unimpeded movement. This often consists of a combination of leather straps, plates, and metal elements in a red and black color scheme.
Weapon: He almost always carries a large blade (sometimes two-handed or with a wide blade)—his signature style. In the anime and manga, the sword's design emphasizes his power and aggressive fighting style.
Additional details: Sometimes ritual patterns or scars can be seen on the body - traces of past battles, which add a stern look. Superhuman strength: Due to the nature of the oni, he is able to deliver crushing blows, destroy fortifications and fight large opponents.
Endurance and Stamina: He can fight for long periods of time without tiring, withstand serious injuries and continue fighting.
Speed ​​and Reaction: His movements are fast and precise, he is able to dodge attacks and counterattack in a split second.
Fighting skills and style
Swordsmanship: He is a master of the sword, combining powerful slashes with quick lunges and feints.
Tactical thinking: in combat, he quickly assesses the situation, finds the enemy's weak points and exploits them.
Leadership in battle: he knows how to coordinate the actions of the squad, distribute tasks and maintain the team's morale.
Magical and special abilities
Fire Magic: As an oni, he has a natural affinity for fire magic and can use it to enhance attacks or

Face and eyes. He has black sclera and bright gold irises, with a thin red line running down the center of each iris—a signature demonic marker that immediately sets him apart. His gaze is calm, almost dispassionate, but it has a cold insight: it seems to read his interlocutor down to the very core.
Hair. His long black hair is styled so that two thin golden strands and one red strand stand out in front—a detail that emphasizes his status and individuality. The styling may vary slightly in different adaptations, but the emphasis on the colored strands remains.
His build is slender but muscular—he doesn't look heavy, but every movement exudes strength and control. His posture is upright, his movements smooth and precise, as if he's always half a step ahead of the situation.
Clothing. He most often wears a butler's outfit, but this is no ordinary servant: the fabric and cut emphasize his status, and the details hint at his combat readiness. In battle or at moments of peak strength, his appearance becomes more "demonic": dark flashes and armor elements appear, and his aura changes.
Aura and effects. There's almost always a faint dark haze or shimmer around him—not so much a visual noise as a marker of his power. When he uses his abilities, the space around him distorts: the air seems to "float," the shadows deepen, and the light becomes sharper. "Temptor" → "King of Temptation Azazel." This is his primary tool: he can influence the minds, emotions, and even the will of his opponents, literally "seducing" them into the actions he desires. In its advanced form, this skill allows him to create entire worlds of illusions, where the victim experiences the scenarios Diablo instills in them.
"Multidimensional Barrier." He can create barriers that protect not only from physical attacks, but also from magic, spatial distortions, and even mental influences. The barrier can be both local (around himself) and large-scale (covering an entire region).
"Space-time control." Diablo can slow down, speed up, and even "turn off" time.

Human form. Appears to be an androgynous teenager, approximately 15-16 years old. He has long silver-blue hair and golden eyes. His facial features are somewhat reminiscent of Shizue Izawa (who served as the basis for this form). His clothing style varies across story arcs, from simple fur coats and fur capes to elegant outfits with gold accents, black pants and shirts, and sometimes a cloak or haori.
Character
Rimuru combines an outward ease with deep calculation:

Friendly and caring. He values ​​his allies highly and strives to create a safe and comfortable environment for them. He's almost like a caring parent to his subordinates: he supports, protects, and helps them grow.
A strategist and analyst. His apparent simplicity conceals a keen mind: he constantly calculates options, develops long-term plans, and skillfully negotiates.
Pragmatic and sometimes ruthless. When it comes to threats to loved ones or the stability of his country, Rimuru acts harshly and without sentimentality. He is not afraid to eliminate enemies and apply pressure when necessary.
He loves "lazy happiness." His greatest dream is a world where he can relax peacefully, enjoy delicious food, and not worry about survival. This desire for comfort often manifests itself in everyday details and decisions.
Prone to self-mockery and gentle manipulation, he knows how to present himself in a favorable light, sometimes concealing details or even falsifying reports to maintain the image of a "good ruler."
Capabilities
Rimuru's abilities are built around his slime nature, the skills he gained from reincarnation, and the creatures he absorbed:

"Great Sage." A companion skill that analyzes information, suggests tactics, recognizes the properties of objects and enemies, and helps with planning.
"Predator" (later evolves into "Gluttony" and "Beelzebub"). Allows the absorption of objects, creatures, and even skills. Rimuru also takes on the abilities, characteristics, and sometimes the form of the absorbed creature.
Mimicry and shapeshifting. Thanks to the nature of the slime and the "Predator" ability

Race: Half-elf. Because of this, she has noticeably pointed ears.
Hair: Long, silver. It usually falls to about her hips. Emilia doesn't bother with her hair herself—her contract spirit, Puck, is responsible for that, and he changes her style periodically. Sometimes she wears her hair in decorative braids.
Eyes: Violet-blue (sometimes described as amethyst). They are often noted for their intelligent, warm gaze.
Skin: pale.
Height: about 164 cm.
Regarding clothing: Emilia most often appears in a white and purple outfit. Her clothing features elegant details, such as floral motifs and ribbons. She also often wears a white flower in her hair. A hawk crest can be seen on the sleeve tips of her clothing—it belongs to the Roswaal family. In some arcs, she also wore a white cloak with cat ears on the hood (it had a memory-blocking spell on it)—this helped her camouflage or protect herself. Ice Magic. Emilia is a very powerful ice mage, although at the beginning of the story, she lacked control due to her fear of harming others. She can:
Create ice constructs. These include sharp ice spears for attack and strong barriers for defense.
Freeze enemies and vast areas. For example, in the past, her uncontrolled magic froze the Elior Forest.
Cast powerful spells. One of Emilia's most powerful spells is Ice Flower Art. It creates a gigantic ice formation capable of inflicting massive damage.
Spirit Contracts. Emilia has a rare talent for interacting with spirits.
At the beginning of the story, she was in close contact with the spirit Puck, who often protected and helped her, acting as a kind of guardian. After breaking her contract with Puck, Emilia began making agreements with other, less powerful spirits to maintain this side of her abilities—kindness and empathy. She genuinely wants to help people and tries not to hurt anyone. Her main goal is to save the frozen ones.

KonoSuba in this style
Kazuma Sato. In Quartet, he's portrayed as a typical "failed strategist": always trying to maximize his advantage and avoid work, but always ends up getting caught up in the chaos. In his chibi form, his sly expression and "it's not my fault" stance emphasize his tendency to deflect responsibility.
Aqua. She's easily recognizable by her exaggeratedly vivid emotions: she's either bursting into tears, or jubilant, or demanding adoration. In the school version, Aqua acts like the capricious star of the class—she craves to be the center of attention, and every little thing becomes a source of drama.
Megumin. In the chibi version, her obsession with explosions is even more comical: she constantly suggests "blowing it up for practice" and proudly proclaims that explosion magic is the pinnacle of magic. Her serious gaze against her tiny frame creates a contrast that enhances the humor.
Darkness. In Isekai Quartet, her masochistic tendencies and chivalrous devotion are portrayed as an exaggerated willingness to "take a blow for everyone." She often offers herself as a shield or sacrifice to save her classmates, much to the confusion and amusement of others.
Atmosphere and humor
Isekai Quartet maintains the KonoSuba style through its signature absurdist humor: the characters find themselves in everyday school situations but react to them as if they were epic adventures. For example, a routine classroom cleaning can turn into a "world-saving operation," and a dispute over a cafeteria seat can become a dramatic factional confrontation.

The chibi design intentionally simplifies details, but retains recognizable features: Megumin has a distinctive hairstyle and robe, Darkness has elements of armor, Aqua has a divine halo and pose, and Kazuma has a relaxed, slightly tired posture.

In this anime, Roswaal serves as a mysterious mentor and organizer. He oversees a group of main characters (Subaru, Albedo, Darkness, Sora, and others), who find themselves in the same school due to a crossover between worlds. His role is not simply to be present, but to actively influence events: he often assigns tasks, organizes trials, or uses his magical and organizational abilities to test the characters or advance the plot. His motives are often murky—he prefers to operate from the shadows, which adds to the intrigue. Height: 186 cm—noticeably taller than Subaru.
Body type: toned, slender, but with impressive musculature, making the figure appear fragile.
Face: Very pale, which, when combined with certain makeup, creates a “classic pretty boy” look.
Hair: Straight, indigo-colored, fairly long (reaching the back). Usually tucked behind the left ear.
Eyes: heterochromic (different)—right blue, left yellow. This is a legacy from previous generations of his family.
Makeup and clothing: He often wears light lavender face powder, purple lipstick, and eyeshadow (simpler on the right eyelid, more elaborate on the left, covering the entire area around the eye). His outfit resembles that of a clown or jester: a black hat, a top and bottom in varying shades of purple, red and black boots, and a cape. Another detail is the chain wrapped around his right ankle. He sometimes appears without makeup, and then his eyes take on a much softer and more welcoming expression. For formal occasions, he wears a long black coat.
Capabilities
As in the original, Roswaal is a very powerful mage. In Isekai Quartet, this manifests itself in his ability to:

Manipulate magic, including using rare techniques that allow you to influence various elements.
Fly - magically move from one place to another (there are scenes in the story where he stands on top of a telephone pole).
Possessing extensive knowledge in the field of magic - over the course of his long life, he has studied many techniques from different worlds

Ainz Ooal Gown in Isekai Quartet is a chibi version of the fearsome Overlord of Nazarick, who appears cute in the crossover yet still manages to maintain the aura of an absolute ruler. In the school setting, he remains extremely serious and collected: while other characters wreak havoc, Ainz tries to restore order and calculate all possible outcomes, as if even the school cafeteria were a strategic location.

His interactions with the other characters are built on contrast: he's accustomed to unquestioning obedience, but in the quartet, he encounters complete unpredictability—from the frivolous Aqua to the stubborn Kazuma. He tries to be a "good classmate," but does so in his own way—through orders, detailed plans, and attempts to control everything.

In the comedic scenes, it's especially amusing to watch his grandeur crumble over mundane trivialities: Ainz might worry about his grades or try to turn the student council into a version of Nazarick's Guardian Council. At the same time, he genuinely cares for "his own" and tries to prevent anyone from getting hurt—even if it means using 10th-tier magic right in the classroom.

Favorite scenes include his attempts to understand the logic of other time travelers and the rare moments when he simply relaxes next to Albedo, who, even in chibi form, remains his devoted caretaker. In Isekai Quartet, Ainz strikes the perfect balance between terrifying power and endearing awkwardness in his new world.

Appearance
Tanya has a rather petite build, blonde hair, and blue (some sources say blue) eyes. Because of this, she's often described as "doll-like," but this sweet appearance contrasts with a harsher, even sinister, inner world. In the series, she wears the military uniform from her original world and carries her magical tool, the Elenium Type 95, at the base of her neck.

Character
In Isekai Quartet, Tanya brings her military pragmatism and rigor to the school environment. She serves on the disciplinary committee and applies the same ruthless logic to school matters as she does on the battlefield. However, her character is nuanced:

Logic and efficiency. She acts prudently, sets goals, and achieves them, minimizing unnecessary steps.
Iron discipline. Tanya does not tolerate laziness, either in herself or in others.
Pragmatism and decisiveness. In difficult situations, she makes quick decisions, sometimes quite tough ones.
Suspiciousness. Due to her experiences in the previous world and her conflict with Being X, she developed paranoia and distrust of "gods."
Reflective ability. Tanya is not without humanity: she can admit a mistake (for example, apologize to Aqua) and is willing to help her classmates with their studies or in difficult situations.
Capabilities
Her powers are a blend of the magical potential gained during her reincarnation and skills honed in the military world. Here's what she can do:

Immense magical power. Ainz Ooal Gown estimated her magical aura to be above Tier 8 in YGGDRASIL.
Magical Aura. In moments of intense anger, Tanya unleashes an aura that can stun, frighten, or shock those around her. Her power is further enhanced when she prays.
Protective Barrier. She can create a powerful magical barrier (Jewel Protective Core) to protect herself and other isekai characters from serious threats (such as an attack from a Mobile Fortress Destroyer). However, Tanya frankly admits that against some opponents, the barrier won't last long.
Flight. Thanks to magical abilities.

Puck may not look like the classic "cute cat spirit," but rather like a stylish, androgynous companion spirit in keeping with the aesthetics of this world:

Form: Most often takes the form of a slender young man with cat ears and a tail, but can change his appearance at will - from a fluffy cat to a silhouette of light.
Colors: cool shades - silver, pale blue, purple; eyes are bright turquoise, sometimes glowing.
Details: on the neck is a thin collar with a magic stone (analogous to the seal of the contract), in the hair are hairpins in the shape of moons and stars.
Aura: Small particles similar to pollen or pixels shimmer around it, emphasizing the "digital" or "rewired" nature of this isekai.
Character
In Isekai Cure, Puck becomes more ironic and detached, but remains attached to his contractor:

Sarcasm and jokes: loves to make fun of pretentious characters and genre cliches, but never crosses the line where it hurts a loved one.
Duality: may seem frivolous, but at a critical moment displays incredible composure and cold calculation.
Attachment: Remains loyal to his contractor, but now expresses this through "I won't let you die stupid" caring instead of overt emotion.
Curiosity: In this world, he is particularly interested in the "mechanics" of reality—how skills work, why some laws of magic are broken, and what lies behind the isekai "system."
Capabilities
In Isekai Cure, Puck's abilities are adapted to the game/system logic of the world:

Space and time manipulation (on a small scale) - can create "pocket zones", slow down time around himself and an ally, teleport over short distances.
Analysis and scanning – sees the "statuses" of people and objects: level, skills, hidden effects, vulnerabilities. This makes him an indispensable tactician.
Reality Distortion - Can temporarily change the properties of objects or the environment (for example, make water solid, air dense to block an attack).
Contractor Protection - Automatically activates b

Appearance
A miniature figure that looks like a little girl, although in fact she is hundreds of years old.
Cream-colored hair with pink tips, styled into two buns.
The eyes are blue, with a butterfly-shaped pattern in the center of the iris.
Doll-style outfit: dress with frills, pink ribbons, cape, tights and shoes.
Accessories: a tiny crown on the right side of her hair and a butterfly ribbon on her chest.
Character
Condescending and arrogant. Often looks down on others, especially if she considers them insufficiently intelligent or serious.
Capricious and stubborn, but at the same time lonely and vulnerable: behind the external bravado lies a need for recognition and warmth.
She is attached to Subaru (in Isekai Quartet this is an important part of her image): she devotes almost all her attention to him, stays close, and gets jealous if someone distracts him.
In the crossover, her personality is softened: she is not as withdrawn as in the original Re:Zero, and sometimes shows concern for others, albeit in her own caustic manner.
Capabilities
Magic: In Isekai Quartet, Beatrice is shown to be a very powerful sorceress. For example, she can easily use spells to launch someone into the air or protect them from flying objects.
Spatial manipulation (similar to her abilities in Re:Zero): she can link doors to the library, creating spatial effects. This is often used comedically in the crossover.
Immense Mana: As an artificial spirit, she is able to maintain powerful spells longer than most other characters.
Knowledge of magic and ancient texts: Her experience and erudition allow her to quickly recognize spells, rituals, and magical traps.

Felicia. Physically, she's a girl with long, blond hair and blue eyes. Personality: cheerful and upbeat, but can be serious when needed. She wears a white and blue dress with a dark blue ribbon across her chest. She also wears a hair clip—an accessory Naofumi gave her back in The Rising of the Shield Hero. Filo is barefoot. Transformation: She can switch between the form of a large bird (filolial) and the form of a little girl with wings.
Flight. In bird form, she flies easily and can give someone a ride.
Physical strength. Even in her miniature form, she remains quite strong and energetic.
Comedic "abilities." In Isekai Quartet, her powers are mostly used for gags: she runs around the school, causing chaos, and unexpectedly helping out in the most ridiculous situations. She's playful and spontaneous. She acts like a child: she loves to run, play, and attract attention.
Loyal to Naofumi. She considers him her "master" and tries to be helpful, though she often does things her own way.
A bit self-centered. She can be loud and doesn't always understand boundaries, but she's also kind.
Curious. Constantly meddling in everyone's business and asking questions, which often leads to funny situations.

Height: 153 cm.
Hair: Golden, shoulder-length. A black bow is often visible in the hair.
Eyes: crimson red.
Smile Trait: When Felt laughs, her "yaeba"—a slightly protruding, pointed fang—becomes more visible. This sometimes gives her a mischievous, mischievous look. A Divine Protection related to wind. It allows Felt to instantly accelerate and make sharp dashes over short distances. With this ability, she can, for example, quickly climb walls and dodge attacks.
High agility and physical fitness. Felt trained from childhood to be agile and able to fend for herself—a result of her life in the slums.
Knife proficiency. In combat, she uses a thick-bladed knife and wields it with great skill.

Subaru is a teenager. He has tousled, medium-length black hair (a trait he inherited from his father), and his eyes are brown (or rather, in the anime they're often drawn black, but in the original description they're brown). One characteristic that others notice is that the small irises make the whites of his eyes stand out, and some find this look slightly unnerving. Overall, his appearance is quite ordinary and unassuming. As for his clothing, he was transported to the other world wearing a tracksuit—dark gray, with an orange stripe down the side. He also wore black sneakers with bright orange laces and soles, a black T-shirt, and a white zip-up tracksuit jacket. In Isekai Quartet, he generally maintains this image, although in different situations he may wear something more appropriate for specific tasks (for example, during adventures, he added an orange scarf, a blazer, or even a long black hooded cloak). Subaru's main and most famous ability is "Return by Death" (Japanese: 死に戻り - Shinimodori). It was granted to him by Satella, the Witch of Envy. The idea is that after death, Subaru returns to a certain "save point" - he retains all memories of past events, but those around him do not. Importantly, he cannot control the exact moment of this return. At first, Subaru perceived this ability as a curse, but over time he came to see it as an opportunity to correct his mistakes. Punishments for disclosure: Subaru cannot tell others about his ability. The Witch chooses her own punishment: she can squeeze his heart with her hand (in extreme cases, this is fatal), or if he tells Emilia, she will crush her heart as well. Furthermore, disclosure increases the density of the Witch Factor, causing demon beasts and other undead to flock to Subaru.

Age: 20 years.
Build: medium height, slim.
Hair: Black, cut short and sticking out in different directions.
Eyes: green.
Facial features: Quite sharp. He often wears a disgruntled, even cynical expression. This is largely due to how he was received and treated after being summoned to another world. But occasionally, a smirk appears on his lips—when he jokes or mocks someone. Over time, he softens: for example, he smiles while playing with the newborn Firo or while showing affection to Raphtalia.
Clothing and equipment: Naofumi wears armor most of the time, primarily the "Barbarian Armor" and its modifications. However, he changes his attire in different situations: for example, in the world of Grass, he temporarily had to wear samurai armor, later the "Berber Armor," and to hide his affiliation with the Heroes in Kutenrou, he donned ordinary cotton clothes. Another important detail: he almost always carries his legendary shield, granted upon summoning.
Naofumi's strength is built around his shield and his teamwork (especially with Firo and Raphtalia). I'd highlight a few key points:
Defense and support. His strength lies not in attack, but in defense: he can create barriers, repel attacks, impede enemy movement, and counterattack. He has high defense overall.
Various shield shapes. He can create several shield variations for different tasks:
Air Strike Shield - Creates a durable, translucent green shield in the air.
Second Shield - allows you to place an additional identical shield.
Shield Prison - Forms a cage of shields that can surround himself or his allies.
Wrath Shield. This is a special, "cursed" form. It activates when Naofumi experiences strong emotions (such as rage). In this state, his physical durability is greatly increased, more destructive techniques are unlocked, and black flames can appear around him. But there is a price: using this form temporarily reduces his stats and also carries the risk of

After her reincarnation, Tanya is a small girl with fair skin, light-colored hair (often tied up, though generally quite long), and bright blue eyes. She is often described as sweet, with a doll-like appearance that contrasts with her rather stern and calculating personality. Magical potential. She initially possesses a high level of latent magical talent, a rarity in her world. This allows her to cast complex spells.
Magical Enhancements. She casts spells that temporarily enhance her physical abilities—strength, speed, and endurance. This allows her to effectively fight hand-to-hand and handle firearms.
Aerial Maneuverability. Using magical equipment and her own abilities, Tanya can fly and perform complex aerial maneuvers. Her movements in the air are sometimes compared to a fairy dance.
Working with Elenium Type 95. This is a key artifact. When Tanya recites the Being X prayer using this magical tool, her physical, mental, and magical abilities are dramatically enhanced. She can cast powerful explosive spells capable of wiping out an entire platoon, and her shooting accuracy and ability to predict enemy movements are significantly increased. However, this power comes at a price: after such bursts, Tanya experiences memory lapses and risks mental distortion. The only thing that keeps her from completely losing herself is the rosary beads around her neck.
A tactical mind. Tanya doesn't just strike with force—she's a master of planning and analysis. She can quickly assess a situation, identify an enemy's weaknesses, and flexibly change her plan mid-battle.
Leadership skills. She is capable of effectively leading a group of mages, directing their actions toward a common goal.
Other abilities. Various adaptations also feature other techniques: creating protective barriers, projecting decoys, infusing a rifle bayonet with magical energy, creating magical blades, or even turning oneself into a "flying bomb."

Rem has medium-length, sky-blue hair that covers her right eye. Her eyes are large and light blue. Her facial features are youthful.

On the left side of her hair, she has hairpins, a flower-shaped ribbon, and a maid ribbon. She usually wears a maid uniform. Rem is slightly taller than her twin sister, Ram, and to hide this, she secretly adjusts the measurements of her Waterbending uniform. She is skilled in this art: she can both attack and heal (but only physical wounds). Specific techniques include "Huma" (a bright water barrier that blocks projectiles and magic), "El Huma" (shooting ice spikes), "Ul Huma" (launching ice blocks), and "Al Huma" (creating a sharp ice spear).
Oni Physiology. In Oni form, her horn not only enhances her physical abilities (strength, speed), but also functions as an antenna, allowing her to absorb mana from the surrounding environment. However, if she remains in this form for too long, Rem may succumb to bloodlust and lose all sense of friend or foe.
Morgenstern. In combat, she uses this weapon—a spiked metal ball attached to a chain. Rem wields it deftly and can dispatch several opponents with a single blow.
Synesthesia. Telepathic connection with her sister Ram: they can share feelings even over distance.

In his normal (human-like) form, the Demiurge looks like this:

Height: about 181 cm.
Partially Asian facial features.
Dark hair, neatly styled back.
Tanned skin.
Round glasses that hide strongly squinted eyes (this creates the impression that the eyes are closed).
He wears a British suit and tie, which is why he is sometimes mistaken for a successful entrepreneur or lawyer.
Behind its back is a silver tail covered with metal plates, at the end of which are six long spikes.
Black flames often swirl around him. Magical attacks and spells. He wields a whole host of powerful spells: "Hellfire" (summons roaring flames from the ground and a shockwave), "Razor Claws" (creates long, sharp claws), "Tentacle Wings" (abnormally long, tentacled wings sprout from his back), "Gehenna Flame" (surrounds the target with a belt of crimson flame, empowering the demons within and inflicting negative effects on enemies), and "Judecca Frost" (freezes the enemy).
Special Skills: "Mantra of Superiority" instantly transforms weak-hearted people into his puppets—but only if the target is below level 40. He can also shapeshift to a limited extent.
Tactical and strategic skills. Demiurge is Nazarick's chief strategist. He enjoys planning complex operations and finding innovative solutions.
Experimental and "creative" approaches. He views other beings (especially prisoners) as material for experimentation. For him, it's not just a fight, but an opportunity to study his opponent, "toy" with their minds, or use them as a tool for his artistic (as he sees it) designs.
Immunity. He is immune to fire.

Height: 104 cm
Skin: dark
Hair: Short, golden, slightly tousled, hanging to the shoulders
Ears: Long and pointed, a typical feature of dark elves
Eyes: Heterochromic: left blue, right green. Her twin brother, Mare, has the opposite heterochromia. Clothing and accessories
Dark red dragon scale shirt
A white vest with gold embroidery, on the chest is the symbol of the guild Ainz Ooal Gown.
White trousers
Light brown practical shoes.
Massive gloves on thin hands
On the neck is a glowing gold necklace with a pendant in the shape of an acorn
A fighting whip is wrapped around the waist
Behind his back is a giant bow with exotic engravings on the handle.
She also has a watch given to her by Ainz, which contains a speech recorded by her creator, Bukubukuchagama.
Aura is one of the Guardians of the 6th Floor of the Great Tomb of Nazarick. While she isn't the strongest level 100 NPC in direct solo combat, her true strength is revealed in other tasks. She specializes in guerrilla warfare and group combat.
Beast Tamer. Aura can tame wild creatures, including those from the New World. She has a whole army of pets at her disposal (for example, Fenrir, a giant black wolf; Crackerlacile, a six-legged chameleon-iguana hybrid; Hejinmal; and Dragonoid). With their help, she significantly enhances her combat capabilities.
Ranger skills: She has excellent physical fitness, high speed, agility, and the ability to maneuver both in open areas and in difficult terrain.
High-level detection Aura is able to notice enemies who use the Invisibility spell. However, against the Perfect Unknown spell, her skills fail: such an enemy will be felt only as a vague presence.
Camouflage: Aura can hide her presence—for example, in the Tob Narberal forest, Gamma was unable to detect her.
Passive skills that act through breathing. By altering the composition of the air in her lungs, she can influence the emotions of those around her. She is clearly dominant towards her brother. She clearly guides Mare, constantly prompting him.

Mare Bello Fiora. A boy with short pink hair and red eyes. Personality: calm, somewhat withdrawn, but loyal to Ainz. Abilities: A vampire twin of Shalltear, he shares similar abilities: transforming into mist, regeneration, and magical attacks. Powerful magic. Mare is a powerful magic caster, specializing in magic related to nature and plants. For example, he can quickly camouflage the vast walls of Nazarick by covering them with vegetation.
Spatial control and immobilization. In combat, he uses spells that restrict the movement of enemies and prevent them from escaping.
Staff use. He wields a twisted black wooden staff as a weapon, which he can use to inflict physical blows. He is shy and timid. He often stutters, is nervous, and appears frightened (this is further reinforced by his appearance, with his perpetually anxious gaze), and tends to keep a low profile.
Obedient and loyal, Mare follows Ainz Ooal Gown's orders without question or question. He also listens to his older sister, Aura, in almost everything.
The opposite of her sister. While Aura is energetic, confident, and assertive, Mare is quiet and modest, highlighting the contrast between the twins.

Shalltear Bloodfallen. She is a tall woman with long purple hair and red eyes. She wears a form-fitting outfit. Her personality is cruel, bloodthirsty, yet devoted to her master. She has the typical vampire aesthetic. She has pale skin, scarlet eyes, and long, flowing hair of a dark red or burgundy hue.
Outfit. The character is built around a revealing yet stylish costume: a corset, stockings, and elements that emphasize her status and predatory nature. In the "school" version of the series, this outfit is adapted into a humorous form, while retaining the key elements.
Attributes. Bat wings and other demonic details remain an important part of her silhouette, immediately distinguishing her from other characters.
Facial expressions and posture. In comedic scenes, her facial expressions are exaggerated: from a flirtatious smile to furious anger. She often adopts theatrical, dramatic poses, emphasizing her eccentricity. She is eccentric and flirtatious. She loves to flirt, and does so openly, unceremoniously, and often to the dismay of others. Her behavior is deliberately provocative, and she enjoys the reactions of others.
Mood swings. The calm, playful Shalltear can instantly transform into a furious, bloodthirsty dominatrix. This trait is played out in the series as sudden outbursts of anger over trivial matters, creating comical effect.
Loyalty and Hierarchy. Despite the comedic tone, her true nature emerges at key moments: she is fanatically devoted to Ainz Ooal Gown and is acutely aware of her place in Nazarick's hierarchy. This devotion can take exaggerated forms, such as overprotectiveness or displays of strength for the sake of "guild honor."
Pride and arrogance. Shalltear considers herself superior to many other characters and isn't shy about showing it. In the school setting, this manifests itself in a condescending attitude toward "normal" students and emphasizing her supernatural status.
Playful cruelty. Her humor often borders on sadism, but within the series it's presented in a humorous way.

Albedo. A girl with long silver hair and red eyes. She wears a revealing outfit that emphasizes her demonic nature. Personality: Loyal to Ainz, she has a strong sense of duty, but is also prone to jealousy and impulsive behavior. Highly intelligent and strategic, she is an excellent tactician and administrator of Nazarick.
Demonic magic and combat skills - can fight and cast spells.
Enormous physical strength and resilience - superior to ordinary people.
Ability to command lesser creatures - easily controls minions.
Loyalty to Ainz - This often becomes the driving force behind her actions in the series.

Ainz Ooal Gown (formerly Momonga). He appears as an undead skeleton. In Isekai Quartet, he retains his signature appearance from Overlord: he wears royal robes—black robes with gold trim—and has large supports on his shoulders, floating red spheres of Ainz Ooal Gown. In the original, he is a powerful lich with a wealth of spells and artifacts. In Quartet, he tries not to use force, but occasionally displays subtle effects (floating spheres, a subtle glow) to remind everyone who is the strongest. His true "strength" in the crossover is his authority and ability to organize everyone. In Isekai Quartet, Ainz Ooal Gown (Ainz) retains his abilities from Overlord:

Magic - has a vast arsenal of spells (including higher and forbidden magic).
Undead and Summons - Can create and control undead, summon creatures.
Combat skills and items - uses powerful artifacts and abilities characteristic of a lich.
Tactical mind - relies on strategy and knowledge of the game mechanics (YGGDRASIL), calculating moves.
Aura of Terror - His presence demoralizes his opponents.

Darkness (real name: Lalatina Dustinez Ford). A knight with powerful attack and defense, but extremely inaccurate strikes. At school, she joins the physical education committee. Her masochistic tendencies have not disappeared—she openly discusses her fantasies and enjoys situations where she is "hurt." A masochist with perverted fantasies. This is the main comedic element of her character: she dreams of being captured by the Demon King's army and tortured. At the same time, she can be very shy and easily embarrassed.
Noble and responsible. She comes from an influential noble family and takes her responsibilities seriously. Darkness truly wants to protect people and follows the ideals of a crusader knight. She is a devoted friend. Despite her eccentricities, she is a reliable team member who always has her comrades' backs and will not abandon them in times of need.
Contradictory. She combines the true dedication of a knight with strange personal desires, often getting into awkward situations and causing problems for the team. A tank role and colossal defense. As a crusader from a noble family renowned for their survivability, Darkness possesses abnormally high defense and health. Her family is considered the "Shield of the Kingdom," and she fully lives up to that reputation.
Resistance to magic and status effects. She can withstand even powerful spells, such as Megumin's explosion magic. She is also resistant to various debuffs (poison, paralysis, etc.).
The "Decoy" skill allows you to attract enemies and absorb damage to protect more fragile team members.
Immense physical strength. Despite her graceful frame, she can be frighteningly powerful when angry.
Low accuracy and a lack of offensive skills. This isn't so much a flaw as a conscious choice: due to her masochistic tendencies, Darkness deliberately neglects accuracy and offensive skills, as she prioritizes taking damage over dealing it.

Megumin. A short, slender girl. She has brown hair tied in shoulder-length ponytails, fair skin, and crimson pupils. She wears a large brown magic hat with a muzzle on it, black fingerless gloves, a choker, a brown coat, a short red skirt, a brown sash around her waist, light brown calf-length boots, a knee-length bandage on her left leg, and a black Megumin stocking on her right. Her signature spell is Explosion, which she casts with great fanfare, expending all her energy, and then collapsing. This becomes a running gag in Isekai Quartet: she blows up something small (like a trash can), then lies back and rests while the others clean up. She is obsessed with Explosion magic to the point that it has become her identity. She's dramatic, fond of pompous poses and speeches, but also kind and loyal to her friends. In Isekai Quartet, she regularly causes mini-disasters, proudly proclaiming it "art." Colossal Damage: This is the most powerful offensive magic spell in the world, surpassing any other advanced spells. Cost per Shot: Explosion Magic consumes absolutely all of Megumin's mana. Immediately after casting the spell, the girl completely loses strength and falls to the ground, unable to even move. Usage Limit: Due to the enormous energy drain, she can only cast this magic once per day. Rejection of Other Skills: Megumin devotes all her experience points exclusively to increasing explosion damage and reducing its casting time (High-Speed ​​Incantation). She flatly refuses to learn other practical spells, remaining completely helpless after her single volley. High Intelligence: As a member of the Crimson Demon race, Megumin has a natural genius understanding of magic and quickly mastered the Archmage profession. Obsession: Passionately fascinated by explosion magic, spending all her skill points solely on the "Explosion" spell. Dedication: Refuses to learn any other useful magic.

Hair: Long, straight hair of a bright blue (sky blue). The top section is pulled back into a distinctive high ponytail with a clip resembling a water molecule or a round droplet. Clothing: A traditional goddess outfit in blue and white with gold accents. A large green bow with a round brooch is tied on the chest. Purification: Any liquid Aqua touches is automatically purified and transformed into pure holy water. This ability allows her to instantly neutralize deadly poisons. Water Manipulation: As the goddess of water, she can summon and control water from a distance, and even create powerful floods (Sacred Create Water). Blessing - Increases luck. Powered - Increases physical strength. Haste - Significantly increases speed. Protection & Resistance - Increases defense against physical and magical attacks. Resurrection: Able to resurrect the dead (including Kazuma) an unlimited number of times, as long as their bodies aren't completely destroyed. Healing (Sacred Highness Heal): Instantly heals any physical wounds and can restore memories erased by magic. Selfish and narcissistic: Considers herself a great goddess, demanding constant worship and admiration from others. Capricious and emotional: Easily becomes hysterical, starts crying, or complains if things don't go according to her plan. Wasteful alcoholic: Loves expensive alcohol, spending all the group's earnings on it, constantly getting into debt because of it. Naive and stupid: Has an extremely low intelligence stat by the standards of the game world, which is why she is unable to calculate the consequences of her actions. Kind, but problematic: Sincerely wants to help, but her "help" almost always leads to even greater destruction and disaster. Turn Undead (Exorcism): Deals devastating damage to demons, evil spirits, and the walking dead. The most powerful versions of these spells (Sacred Exorcism) are released as a beam from the forehead. Remove Curses

Kazuma Sato. A teenager with slightly tousled, ear-length brown hair and green eyes. In the Isekai Quartet world, he wears an adventurer's outfit: a green robe with gold trim, a white shirt, trousers, and leather boots. He's a pragmatist and cynic who longs for a quiet life and money over heroism. In the crossover, he often tries to be the "voice of reason," but is constantly pulled into chaos. He's sarcastic, especially toward Aqua, and tries to stay out of trouble—but it rarely works. Kazuma Sato. In the original, he doesn't have powerful magic—his strength lies in cunning, planning, and the ability to coordinate a team. In Quartet, this is presented as "the only one trying to organize everything," but his plans are always ruined by the chaos around him. Ability
High Luck. This is his main "superpower": it enhances his other skills, for example, allowing him to win at gambling and making his Steal skill almost infallible.
Thief Skills: Kazuma uses Steal, Stealth, and Enemy Detection. Due to his luck, he's particularly known for constantly stealing things (which often leads to comedic situations).
Basic magical skills. He possesses simple elemental spells: he can create water, earth, summon wind, and freeze objects. Kazuma skillfully combines these spells for tactical purposes—for example, creating a curtain of dust by combining Earth Creation and Wind Breath.
Archery skills and trap detection. He has abilities for ranged combat and trap detection, which helps him in adventures.
Character
Cynical and sarcastic, Kazuma is often sarcastic and openly criticizes his comrades (especially Aqua, whom he considers useless).
Pragmatic and calculating, he doesn't seek heroism for its own sake and always thinks about profit and safety. He prefers cunning plans and tactics over direct combat.
Lazy but responsible in critical moments